EulerOS 2.0 SP15 : python3 (EulerOS-SA-2026-2906)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(332936);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/06");

  script_cve_id(
    "CVE-2026-1502",
    "CVE-2026-2297",
    "CVE-2026-4786",
    "CVE-2026-6019",
    "CVE-2026-6100"
  );

  script_name(english:"EulerOS 2.0 SP15 : python3 (EulerOS-SA-2026-2906)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the python3 packages installed, the EulerOS installation on the remote host is affected by
the following vulnerabilities :

    The import hook in CPython that handles legacy *.pyc files (SourcelessFileLoader) is incorrectly handled
    in FileLoader (a base class) and so does not use io.open_code() to read the .pyc files. sys.audit handlers
    for this audit event therefore do not fire.(CVE-2026-2297)

    CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.(CVE-2026-1502)

    http.cookies.Morsel.js_output() returns an inline script snippet and only escapes ' for JavaScript
    string context. It does not neutralize the HTML parser-sensitive sequence /script inside the
    generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie
    value.(CVE-2026-6019)

    Mitgation of CVE-2026-4519 was incomplete. If the URL contained '%action' the mitigation could be bypassed
    for certain browser types the 'webbrowser.open()' API could have commands injected into the underlying
    shell. See CVE-2026-4519 for details.(CVE-2026-4786)

    Use-after-free (UAF) was possible in the `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and
    `gzip.GzipFile` when a memory allocation fails with a `MemoryError` and the decompression instance is re-
    used. This scenario can be triggered if the process is under memory pressure. The fix cleans up the
    dangling pointer in this specific error condition._x000D_
    _x000D_
    The vulnerability is only present if the program re-uses decompressor instances across multiple
    decompression calls even after a `MemoryError` is raised during decompression. Using the helper functions
    to one-shot decompress data such as `lzma.decompress()`, `bz2.decompress()`, `gzip.decompress()`, and
    `zlib.decompress()` are not affected as a new decompressor instance is used per call. If the decompressor
    instance is not re-used after an error condition, this usage is similarly not vulnerable.(CVE-2026-6100)

Tenable has extracted the preceding description block directly from the EulerOS python3 security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2026-2906
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?317168ea");
  script_set_attribute(attribute:"solution", value:
"Update the affected python3 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-6019");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-6100");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/02/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-fgo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-help");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-unversioned-command");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var _release = get_kb_item("Host/EulerOS/release");
if (isnull(_release) || _release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (_release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP15");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(15)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP15");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP15", "EulerOS UVP " + uvp);

if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "x86" >!< cpu) audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

var flag = 0;

var pkgs = [
  "python3-3.11.6-10.h21510.24.eulerosv2r15",
  "python3-devel-3.11.6-10.h21510.24.eulerosv2r15",
  "python3-fgo-3.11.6-10.h21510.24.eulerosv2r15",
  "python3-help-3.11.6-10.h21510.24.eulerosv2r15",
  "python3-unversioned-command-3.11.6-10.h21510.24.eulerosv2r15"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"15", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "python3");
}